LAX92FA065
1991-12-20 · FLAGSTAFF, Arizona, United States · Fatal · 1 aircraft · Status: Completed
Airport FLG
N766BA has since been reassigned. It is now registered to a different aircraft (ICON AIRCRAFT INC A5, built 2016), which was not involved in this event.
Aircraft involved
Probable cause & findings
**This report was modified on 4/21/2016. Please see the public docket for this accident for additional information.** the pilot's failure to maintain airspeed at low altitude, which resulted in a stall and loss of airplane control during a circling approach to landing in instrument meteorological conditions.
Factual narrative
**This report was modified on 4/21/2016. Please see the public docket for this accident for additional information.** The instrument-rated commercial pilot was executing a circling VOR/DME instrument approach in IFR conditions. The pilot reported the runway in sight and was circling to land west of the airport just before the accident. Witnesses reported that the airplane descended in a near vertical attitude from the overcast, striking a highway curb lane about .75 miles from the airport. No evidence of preimpact failures or malfunctions with the primary flight controls or engines was found. The pitch trim position could not be determined conclusively because the trim control cables were broken and disrupted by impact. However, evidence was not sufficient to conclude that full nose-down trim was present at the time of upset. An examination of the autopilot annunciator module indicated that the HDG, NAV, AUTOTRIM and FAIL warning lights may have been illuminated. When the autopilot detects a trim system failure, the trim servo is deactivated and the AUTOTRIM and FAIL warning lights will flash. The AUTOTRIM light will also flash if the trim master switch is turned off, making the autopilot system evidence inconclusive. Because the autopilot system evidence was inconclusive, the role of the autopilot in the accident could not be determined. However, airplane descent information provided by witnesses and impact evidence were consistent with an aerodynamic stall at low altitude and were not consistent with an uncorrected autopilot induced pitch-down excursion. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1991_LAX92FA065.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Matched on aircraft type or causal vocabulary (stall, autopilot). All research papers
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